package com20230217;

public class PersonTest {
    public static void main(String[] args) {
        //调用无参构造，不使用set方法赋值，获得的是无参构造里定义的默认值
//        Person person = new Person();
//        person.say();
        Person person1 = new Person("周雷雷",23,"男");
        person1.say();
    }
}
